Is anyone using these vises and how are they performing. They have all the features I'm looking for except the on the new versions, the base is apparently made of cast aluminum with ground steel plate bolted to the top. Wish they just kept the older cast iron design and put fixed jaw on front and other improvements they did. I'm getting a lot of low quantity stuff and always taking vises on and off the table and constantly changing jaws so this looks great but I'm not sure if I can get over the cast aluminum part.